A mangrove is a humid ecosystem characteristic of tropical or subtropical coastlines. It is an area at the junction between sea and land. The mangrove is governed by the swing of the tides (high tide, low tide) and is home to many plant and animal species. It has an ecological function: the mangrove retains sediments, filters the waters that feed the groundwater and captures waste and toxic substances that are directed to the sea. Brazil is the country with the largest area of ​​mangroves in the world , they occupy approximately 20,000 km2 of the territory.